What is the fully factored form of 9b^6-63b^3-90b^2?

9b^2(b^2-7b^3/2 -10b)

9(b^6-7b^3-10b2^)

9b^2(b^4-7b-10)

9b(b^5-7b2^-10b)

The fully factored form of 9b^6-63b^3-90b^2 is 9b^2(b-3)(b+2)(b^2+3b+5).